文章摘要
袁青泉,李 波.绞联化玄武岩纤维对再生水泥稳定碎石 路用性能影响研究[J].水泥工程,2025,38(5):57-60
绞联化玄武岩纤维对再生水泥稳定碎石 路用性能影响研究
Study on the effects of hinged basalt fibers on the road performance of recycled cement stabilized macadam
  
DOI：
中文关键词: 水泥稳定碎石  再生水泥  绞联化玄武岩纤维  干缩性能
英文关键词: Cement stabilized macadam  recycled cement  interlocked basalt fiber  dry shrinkage performance
基金项目:
作者单位
袁青泉 江苏京沪高速公路有限公司 
李 波 扬州大学建筑科学与工程学院 
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中文摘要:
      为提升再生水泥稳定碎石（RCWS）路用性能、推动道路废弃材料资源化，本研究将 1% 体积掺量的树脂绞联化玄武岩纤维掺入再生骨料取代率为 0%、50%、100% 的 RCWS 中，测试其力学与干缩性能。结果表明：随着再生骨料取代率的增加RCWS强度呈现先增后降趋势（50%取代率时强度最高），但其干缩性能显著劣化（取代率100%时28 d干缩应变增57.8%）。掺入1%（体积）绞联化玄武岩纤维可显著改善RCWS各项性能：相较于无纤维对照组，纤维增强组（BF组）的7 d无侧限抗压强度提升12.4%~15.0%，劈裂强度增加51.2%~58.3%，弯拉强度增大25.8%~34.8%。同时，纤维有效抑制了RCWS干缩变形，使7 d和28 d累积干缩应变降低8.9%~15.5%，为高掺量再生骨料在道路基层应用提供技术支撑。
英文摘要:
      To enhance the road performance of recycled cement stabilized waste stone (RCWS) and promote the resource utilization of road waste materials, this study incorporated 1% volume fraction of resin-crosslinked basalt fiber into RCWS with 0%, 50%, and 100% replacement rates of recycled aggregates, and tested its mechanical and dry shrinkage properties. The results showed that as the replacement rate of recycled aggregates increased, the strength of RCWS first increased and then decreased (with the highest strength at a 50% replacement rate), but its dry shrinkage performance significantly deteriorated （the 28 d dry shrinkage strain increased by 57.8% at a 100% replacement rate）. Incorporating 1% （by volume） of resin-crosslinked basalt fiber significantly improved the performance of RCWS: compared to the control group without fibers, the 7-day unconfined compressive strength of the fiber-reinforced group （BF group） increased by 12.4% to 15.0%, the splitting tensile strength increased by 51.2% to 58.3%, and the flexural tensile strength increased by 25.8% to 34.8%. Meanwhile, the fibers effectively suppressed the dry shrinkage deformation of RCWS, reducing the cumulative dry shrinkage strain at 7 d and 28 d by 8.9% to 15.5%, providing technical support for the application of high-volume recycled aggregates in road base layers.
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